CVE-2026-22561
High
Description
Uncontrolled search path elements in Anthropic Claude for Windows installer (Claude Setup.exe) versions prior to 1.1.3363 allow local privilege escalation via DLL search-order hijacking. The installer loads DLLs (e.g., profapi.dll) from its own directory after UAC elevation, enabling arbitrary code execution if a malicious DLL is planted alongside the installer.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Anthropic Claude
PublishedMar 31, 2026
First seenMar 31, 2026
Weakness typeCWE-427CWE-427
How to fix
Update
- anthropic claude1.1.3363 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| anthropic claude | v < 1.1.3363 | 1.1.3363 |
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